EP0348901B1 - Process for producing optically active alfa-substituted organic acid and microorganism and enzyme used therefor - Google Patents
Process for producing optically active alfa-substituted organic acid and microorganism and enzyme used therefor Download PDFInfo
- Publication number
- EP0348901B1 EP0348901B1 EP89111684A EP89111684A EP0348901B1 EP 0348901 B1 EP0348901 B1 EP 0348901B1 EP 89111684 A EP89111684 A EP 89111684A EP 89111684 A EP89111684 A EP 89111684A EP 0348901 B1 EP0348901 B1 EP 0348901B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- group
- substituted
- strain
- optically active
- acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
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- 150000007524 organic acids Chemical class 0.000 title claims description 26
- 238000000034 method Methods 0.000 title claims description 23
- 230000008569 process Effects 0.000 title claims description 19
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- 238000002360 preparation method Methods 0.000 claims description 23
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- 108010033272 Nitrilase Proteins 0.000 claims description 14
- 150000001875 compounds Chemical class 0.000 claims description 14
- -1 phenyloxy Chemical group 0.000 claims description 13
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- 125000000623 heterocyclic group Chemical group 0.000 claims description 9
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- 125000003118 aryl group Chemical group 0.000 claims description 7
- 125000004104 aryloxy group Chemical group 0.000 claims description 7
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Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P7/00—Preparation of oxygen-containing organic compounds
- C12P7/40—Preparation of oxygen-containing organic compounds containing a carboxyl group including Peroxycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
- C12N9/14—Hydrolases (3)
- C12N9/78—Hydrolases (3) acting on carbon to nitrogen bonds other than peptide bonds (3.5)
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P17/00—Preparation of heterocyclic carbon compounds with only O, N, S, Se or Te as ring hetero atoms
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P41/00—Processes using enzymes or microorganisms to separate optical isomers from a racemic mixture
- C12P41/006—Processes using enzymes or microorganisms to separate optical isomers from a racemic mixture by reactions involving C-N bonds, e.g. nitriles, amides, hydantoins, carbamates, lactames, transamination reactions, or keto group formation from racemic mixtures
Definitions
- This invention relates to a process for producing an optically active ⁇ -substituted organic acid and microorganism and enzyme used therefor.
- Optically active ⁇ -substituted organic acids obtained by the process of the present invention are compounds useful as pharmaceutically active substances, such as antipyretic analgestic antiphlogistic agents; as raw materials thereof, such as antibiotics and ⁇ -blockers; as agricultural chemicals, such as herbicides and insecticides or raw materials thereof; as raw materials for compounds having super dielectric properties; and as optical resolving reagents.
- WO 86/07 386 describes a process for preparing an optically active amino acid or amino acid amide of the general formula R-CH(NH2)COX having an amino group in ⁇ -position.
- the present inventors have discovered microorganisms capable of exclusively forming said optically active ⁇ -substituted organic acids to achieve the above-described objects.
- the present inventors have found microorganisms which have the ability to convert racemic ⁇ -substituted nitriles or amides represented by formula (I) into optically active ⁇ -substituted organic acids represented by formula (II).
- the optically active ⁇ -substituted organic acids formed by the action of the microorganisms are scarcely racemized, decomposed or utilized.
- the present invention has been achieved on the basis of these findings.
- the present invention provides a process for producing an optically active organic acid represented by formula (II), which comprises
- X represents a nitrile group or an amido group.
- R1 and R2 each represent a halogen atom, a hydroxyl group, an alkyl group, a cycloalkyl group, an alkoxy group, an aryl group, an aryloxy group or a heterocyclic group with the proviso that the groups R1 and R2 are always different from each other.
- the Figure is a graph showing the progress of the production of 2-(4′-isobutylphenyl)propionic acid by using purified nitrilase, wherein the ordinate axis represents concentration and the abscissa axis represents reaction time.
- halogen represented by R1 and R2 in formulae (I) and (II) include fluorine, chlorine, iodine and bromine.
- alkyl group and the alkoxy group those having from 1 to 8 carbon atoms are preferred and those having from 1 to 3 carbon atoms are particularly preferred.
- Preferred examples of the cycloalkyl group are those having from 3 to 8 carbon atoms and those having from 3 to 6 carbon atoms are more preferred.
- the aryl group include phenyl and naphtyl.
- the aryloxy group include phenyloxy and naphthyloxy.
- heterocyclic group are those having one or more hetero-atoms selected from among nitrogen, oxygen and sulfur and having from 3 to 15 carbon atoms, more preferably those having 1 to 4 of hetero-atoms.
- heterocyclic groups include thiophene, indole,
- Hydrogen atoms attached to the carbon atoms of the alkyl group, alkoxy group, cycloalkyl group, aryl group and aryloxy group and hydrogen atoms attached to the carbon atoms and the nitrogen atom of the heterocyclic group may be optionally substituted by one or more substituent groups.
- Suitable substituent groups include a halogen atom such as fluorine, chlorine, iodine and bromine, a hydroxyl group, a thiol group, a nitro group, an amino group, an aryl group (e.g., phenyl or naphthyl group), an aryloxy group (e.g., phenyloxy or naphthyloxy group), a heterocyclic group containing one or more hetero-atoms such as a nitrogen atom, an oxygen atom and a sulfur atom and having from 3 to 15 carbon atoms, an alkyl group having from 1 to 8 carbon atoms, an alkoxy group having from 1 to 8 carbon atoms and an acyl group having from 1 to 10 carbon atoms.
- a halogen atom such as fluorine, chlorine, iodine and bromine
- a hydroxyl group e.g., phenyl or naphthyl group
- an aryloxy group e.
- Hydrogen atoms attached to the carbon atoms of the above-described substituent groups and hydrogen atoms attached to the carbon atoms and the nitrogen atom of the above heterocyclic group may be further substituted by one or more of the above-described substituent groups.
- R1 and R2 When either one of R1 and R2 is a highly sterically hindered group such as a halogen atom, an aryl group, an aryloxy group or a residue of a heterocyclic ring, or when either one of R1 and R2 is a group substituted by the highly sterically hindered group, products having very high optical purity can be obtained.
- a highly sterically hindered group such as a halogen atom, an aryl group, an aryloxy group or a residue of a heterocyclic ring
- the compounds represented by formula (I) which are used as the starting materials in the present invention can be prepared by conventional methods as described, for example, in JP-A-51-70744, JP-A-51-122036, U.S. Patent 4,186,270 and Synthesis , 8 , 645 (1986).
- microorganisms which can be used in the present invention are those selected from the group consisting of the microorganisms of genuses Alcaligenes , Pseudomonas , Rhodopseudomonas , Corynebacterium , Acinetobacter , Bacillus , Mycobacterium , Rhodococcus and Candida .
- microorganisms can be used.
- IFO 3925 Alcaligenes faecalis ATCC 8750, Pseudomonas fluorescens NRRL B-981 (IFO 3925) (the term IFO as used herein means the microorganism on deposit at the Institute for Fermentation, Osaka, Japan), Pseudomonas fluorescens IFO 3081, Rhodopseudomonas sphaeroides ATCC 11167, Corynebacterium nitrilophilus ATCC 21419, Corynebacterium sp. KO-2-4 (FERM BP-2353), Acinetobacter sp.
- AK 226 (FERM BP-2451), Bacillus subtilis CN5 (FERM BP-2354), Mycobacterium sp. AC777 (FERM BP-2352), Rhodococcus sp. AK 32 (FERM BP-1046), Pseudomonas vesicularis ATCC 11426, and Candida tropicalis ATCC 20311.
- a live culture of the microorganism Rhodococcus sp. AK 32 is on deposit at the Fermentation Research Institute, Japan, under the above designated number. The mycological properties thereof are described in European Patent 204,555 (1986).
- Corynebacterium sp. KO-2-4, Bacillus subtilis CN5 and Mycobacterium sp. AC777 were newly isolated as nitrile-utilizing bacteria from soil and are on deposit at the Fermentation Research Institute, Japan, under the above designated numbers.
- Acinetobacter sp. AK 226 has been already isolated to form unsaturated organic acids such as acrylic acid or methacrylic acid from the corresponding nitrile compounds (see, JP-B-63-2596 (the term “JP-B” as used herein means an "examined Japanese patent publication)). This strain is on deposit at the Fermentation Research Institute, Japan.
- Corynebacterium sp. KO-2-4, Bacillus subtilis CN5, Mycobacterium sp. AC777 and Acinetobacter sp. AK 226 are as follows:
- the KO-2-4 strain is a bacillus which does not form spores, aerobic, Gram-positive and catalase positive, is non-flagellate and does not have motility. It is clear that it is a strain belonging to the group of Coryneform bacteria, because it has such polymorphism that in the early stage of growth, it is rod and grown with snapping and then undergoes plastmotomy into rod form. Further, the strain is incapable of decomposing cellulose, is not acid fast, is not an absolute aerobe and is negative in OF test. Thus, it can be identified that the KO-2-4 strain is a bacterium belonging to the genus Corynebacterium .
- the CN5 strain is mainly a Gram-positive bacillus and forms spores. Further, it is flagellate and mobile. Thus, it is clear that the strain belongs to the family Bacillaceae.
- the CN5 strain is aerobic and catalase-positive. Hence, the strain belongs to genus Bacillus . Further, the strain does not form gas from glucose, is capable of hydrolyzing starch, is positive in VP test, is capable of reducing nitrate, is grown at 50°C and in Bouillon broth containing 7% Nacl and allows citric acid on Koser's citrate medium to be utilized. Accordingly, it can be identified that the strain is Bacillus subtilis .
- the AC777 strain is an aerobic Gram-positive bacillus, undergoes plastomotomy into rod form and does not form spores. Hence, it belongs to the group of coryneform bacteria. Further, the strain exhibits oxidative in OF test, can form an acid from glucose and is oxidase-negative. Accordingly, it can be identified that the strain belongs to the genus Mycobacterium .
- the reaction of the present invention is carried out by bringing a racemic nitrile or amide of formula (I) into contact with the microorganism or a preparation thereof.
- microorganism or preparation thereof refers to cultured medium obtained by culturing the microorganism; cells collected therefrom or treated cells (for example, disintegrated cells or enzyme extracted from the cells); or cells or treated cells immobilized on a carrier by an appropriate method.
- the microorganisms of the present invention can be cultured according to conventional methods.
- Culture mediums known as nutrient sources can be used.
- Carbon sources including glucose, glycerol, ethanol, sucrose, dextrin, acetic acid; nitrogen sources including ammonium sulfate, ammonium chloride, ammonia; organic nutrient sources including yeast extract, malt extract, peptone, meat extract; and inorganic nutrient sources including phosphoric acid, magnesium, potassium, iron, manganese, can be used in an appropriate combination.
- cyano compounds such as isobutyronitrile may be added to accelerate the reaction activity of the microorganisms of the present invention.
- the pH of the medium is in the general range of from 5 to 10.
- the culture temperature is 18 to 50°C, preferably 25 to 40°C. The culture is allowed to proceed until activity reaches maximum, generally for 1 to 10 days.
- the reaction conditions of the present invention are such that an aqueous solution such as water, a buffer solution or a culture medium or a two phase system consisting of an organic solvent and an aqueous solution can be used as the reaction solution.
- the racemic compound represented by formula (I) in the form of a powder or a liquid as such is added to the reaction solution.
- the racemic compound is dissolved in an appropriate solvent and added.
- the amount of the racemic compound to be added is in the range of 0.01 to 70% by weight, preferably 0.1 to 40% by weight and it is not necessary to completely dissolve the racemic compound in the reaction solution.
- the concentration of the bacterium to be used for reaction is in the general range of from 0.05 to 20% by weight.
- the reaction temperature is in the general range of 5 to 80°C, preferably 15 to 60°C, and pH is in the general range of 4 to 11, preferably 6 to 10.
- the reaction time is generally 1 to 100 hours.
- the racemic compound represented by formula (I) may be continuously or intermittently added to the reaction solution to replenish the racemic compound so that the concentration of the racemic compound can be kept in the range described above.
- the reaction may be terminated before the content of the formed optically active ⁇ -substituted organic acid represented by formula (II) is not lowered.
- the reaction is generally carried out until reactivity reaches 8 to 60%.
- the desired product of the present invention can be recovered in the following manner.
- the pH of the resulting solution is adjusted to 8.5.
- the unreacted compound of formula (I) is extracted with a solvent such as n-butanol, benzene, diethyl ether or chloroform, to remove it.
- the pH of the resulting solution is then adjusted to 2 and extraction is carried out with a solvent such as n-butanol, benzene, diethyl ether or chloroform, whereby the desired product can be recovered.
- the product can be purified by means of silica gel column chromatography, followed by elution with a solvent, such as a mixture of, e.g., hexane, diethyl ether, chloroform and methanol.
- the reaction mechanism of the present invention is such that the enzyme which converts the nitrile or amide into a carboxylic acid, that is, amidase, nitrilehydratase or nitrilase, reacts selectively with only one isomer of the racemic nitrile or amide. Namely, it is believed that the enzyme reaction rate varies greatly with the optical isomer. Accordingly, when an optically active organic acid is prepared by the process of the present invention, an optically active nitrile or amide is consequently left or formed as an unreacted material or an intermediate. The nitrile or amide can be easily converted into an optically active organic acid by hydrolyzing it in the presence of an acid.
- any R isomer and S isomer or (+) isomer and (-) isomer of an organic acid can be prepared in the present invention.
- an optically active nitrile or amide which is an unreacted material or an intermediate is racemized, e.g., by a reaction using an alkali, such as ammonia, and the resulting racemic nitrile or amide can be used as the starting material of the present invention.
- the desired optically active organic acids can be prepared in high yields on an industrial scale.
- Amidase, nitrile hydratase or nitrilase isolated from the microorganisms of the present invention have such specificity that there is a possibility that the reaction rate will vary greatly with the optical isomer when reacted with the racemic nitrile or amide.
- the present inventors isolated nitrilase or amidase having such specificity from the above-described microorganisms.
- Nitrilase isolated from Acinetobacter sp. AK 226 strain will be illustrated below by way of example.
- Acinetobacter sp. AK 226 strain is cultured in the above-described medium.
- the material for accelerating reaction activity is added and the strain is cultured for 1 to 3 days under the above-described culture conditions.
- Nitrilase is recovered from the resulting culture medium and can be purified by conventional enzyme purifying methods. Bacteria is collected by centrifugation and disintegrated by an ultrasonic treatment or a mechanical means such as daino mill. Solids, such as cell memblens, are removed by centrifugation. The resulting crude enzyme is subjected to fractional ultra-centrifugation, salting-out treatment, precipitation treatment with organic solvents and further purification by means of adsorption chromatography, ion-exchange chromatography, and/or gel permeation chromatography. This is described in more detail in the example.
- the amount of 2-(4′-isobutylphenyl)propionic acid is measured by means of high performance liquid chromatography wherein » Bondapack C18 column is used and a solvent obtained by mixing 0.05 M phosphate buffer solution (pH 3) with 50% (v/v) of acetonitrile is used.
- the assay is performed at an absorbance of 254 nm.
- the amount of ammonia formed is measured according to J. Clin. Path ., 13 , 156 (1960).
- the amount of enzyme required for forming 1 »mol of 2-(4′-isobutylphenyl)propionic acid or ammonia per one minute is referred to as one unit.
- Nitrilase of the present invention is isolated in a pure form and has the following properties.
- Function One molecule of a nitrile compound is hydrolyzed to form one molecule of an organic acid and one molecule of ammonia. The reaction rate with the S isomer of racemic 2-(4′-isobutylphenyl)propionitrile is much higher than that of the R isomer thereof. Accordingly, optically active S-(+)-2-(4′-isobutyl)propionic acid is formed. This is described in the example.
- Substrate specificity The enzyme reacts with many nitrile compounds such as aliphatic nitriles and aromatic nitriles given in the following Table 2.
- Optimum temperature Maximum effect is obtained at a temperature of about 45 to 60°C.
- Absorption spectrum Maximum absorption spectrum at about 223 nm and 280 nm.
- Molecular weight About 580,000 measured by means of high performance liquid chromatography with Asahipak GS-620(a product of Asahi Chemical Industry Co., Ltd.)
- Molecular weight of subunit 42,000 to 47,000 calculated by electrophoresis of SDS-polyacrylamide gel.
- the above enzyme is a novel nitrilase which reacts with a wide range of aliphatic nitriles and aromatic nitriles. Further, the above enzyme has such an excellent effect that 2-(4′-isobutylphenyl)propionitrile is hydrolyzed with optical specificity when said nitrile is used as substrate.
- bacteria After culture, bacteria (5.2 g; dry weight) was collected by centrifugation, suspended in 160 ml of 0.01 M phosphate buffer (pH 8.0) and placed in an Erlenmeyer flask. 1.6 g of ⁇ -phenylpropionitrile was added thereto and the reaction of the mixture took place while shaking it at 32°C. After 20 hours, the reaction was terminated and the bacteria were removed by centrifugal separation. The pH of the resulting supernatant liquid was adjusted to 8.5. 200 ml of chloroform was added thereto to extract and remove the unreacted ⁇ -phenylpropionitrile. The pH of water layer was adjusted to from 1.0 to 2.0 with hydrochloric acid.
- Example 2 In the same way as in Example 1, to 500 ml of the sterilized culture medium 2% of the microorgnism which was previously cultured on the same medium was inoculated. The media was cultured at 32°C for two days by means of shaking culture. After culture, the bacteria was collected by centrifugal separation, suspended in 30 ml of 0.01 M phosphate buffer (pH 8.0) and placed in an Erlenmeyer flask. 300 mg of ⁇ -phenylpropionitrile was added thereto and the mixture was reacted at 32°C with shaking.
- 0.01 M phosphate buffer pH 8.0
- optical specificity was determined using high performance liquid chromatography according to the method for analyzing S-(-)-1-(naphtyl)ethylamide [ Journal of Chromatography , 378 , p409 ⁇ 418 (1986)].
- Bacteria were cultured, collected by centrifugal separation, suspended in 30 ml of 0.01 M phosphate buffer solution (pH 8.0) and placed in an Erlenmeyer flask, as in Example 2. 300 mg of ⁇ -phenylpropioniamide was added thereto and the reaction was carried out at 32°C with shaking.
- the pH of the resulting supernatant liquid was adjusted to 8.5. 30 ml of chloroform was added thereto to extract and remove the raw nitrile compound and the corresponding amide compound.
- the pH of the aqueous layer was adjusted to from 1.0 to 2.0 with hydrochloric acid and 30 ml of chloroform was added thereto to extract the desired product.
- the extract was concentrated under reduced pressure and purified by means of silica gel column chromatography, eluting with hexane-diethyl ether (3:1 by volume). The desired eluate was concentrated under reduced pressure to give 42 mg of (+)-2-(5H-[1]benzopyrano[2,3-b]pyridine-7-yl)propionic acid [(+)-Pranoprofen].
- Example 4 The culture procedure of Example 4 was repeated except that 2 l of culture medium containing 1% ammonium acetate in place of glucose was used. 40 g of bacteria was collected by centrifugal separation, washed with 0.01 M potassium phosphate buffer solution (pH 6.5) and then suspended in 160 ml of 0.03 M potassium phosphate buffer solution (pH 6.5). The suspension was subjected to an ultrasonic treatment (9 KHz) for 30 minutes to disrupt cells. The disrupted cells were removed by centrifugal separation (15,000 x g for 20 minute) to obtain a cell-free extract. The extract was dialyzed against a 0.03 M potassium phosphate buffer solution (pH 6.5) and subjected to centrifugal separation (100,000 x g for 2 hours).
- the supernatant liquid was passed through a DEAE-cellulose column to elute enzyme with a linear gradient of 0.05 M potassium phosphate buffer solution (pH 6.5) containing 0 to 0.5 M sodium chloride. Active fractions were collected, dialyzed against 0.01 M potassium phosphate buffer solution (pH 6.5) and passed through a hydroxyapatite column to elute enzyme with a linear gradient of 0.01 to 0.2 M potassium phosphate buffer solution (pH 6.5). Active fractions were collected, dialyzed against 0.03 M potassium phosphate buffer solution (pH 6.5) and purified by means of the DEAE-cellulose column and the hydroxyapatite in a similar manner to that described above.
- Nitrilase uniformly purified in Example 7 was used and the progress of the reaction was examined under the following conditions.
- Acinetobacter sp. AK 226 strain was cultured in the same way as in Example 4. Bacteria (950 mg; dry weight) were collected by centrifugal separation, suspended in 30 ml of 0.1 M phosphate buffer (pH 8.0) and placed in an Erlenmeyer flask. 5 ml of hexane containing 1.5 g of 2-(4′-isobutylphenyl)propionitrile was added to the suspension and the reaction was carried out at 32°C with shaking. After 16 hours, the reaction was terminated and bacteria were removed by centrifugal separation. The pH of the aqueous layer was adjusted to 8.5 by adding 270 ml of water and sodium hydroxide. The hexane layer was removed.
- Example 11 One liter of the culture medium having the same composition as that of Example 11 was used. To the medium, each of Pseudomonas vesicularis ATCC 11426 strain and Candida tropicalis ATCC 20311 was inoculated. Culture was conducted. The collected cells (1.76 g and 7.14 g; dry weight) were suspended in 100 ml and 500 ml of 1.0 M phosphate buffer (pH 8.0), respectively. 2.0 g of mandelamide was added to 100 ml of each suspension. The mixtures were reacted at 32°C for 40 hours under shaking. Insoluble matter such as cells were removed from each reaction soution by centrifugal separation. The pH of the supernatant liquids were adjusted to 1.0 with hydrochloric acid. 50 ml of diethyl ether was added thereto to extract the desired product. The extracts were purified in the same way as in Example 11.
- Mycobacterium sp. AC777 was cultured.
- the bacteria (710 mg; dry weight) was suspended in 80 ml of 0.1 M phosphate buffer (pH 8.0).
- 200 mg of 2-chloropropionitrile was added to 20 ml of the suspension.
- the mixture was reacted at 32°C for two hours under shaking.
- Insoluble matter was removed from the reaction solution by centrifugal separation.
- the pH of the supernatant liquid was adjusted with sodium hydroxide to 9.
- 20 ml of chloroform was added to the supernatant liquid to remove the unreacted 2-chloropropionitrile.
- the pH of the aqueous layer was adjusted to 1 with hydrochloric acid.
- n-butanol 20 ml of n-butanol was added to said aqueous layer to extract the desired product.
- the n-butanol layer was concentrated under reduced pressure and purified by means of column chromatography on silica gel (500 mg, adjusted with chloroform), eluting with chloroform-methanol (10:1 by volume).
- the desired eluate was concentrated under reduced pressure to give 59 mg of S-(-)-2-chloropropionic acid.
- Mycobacterium sp. AC777 strain was cultured.
- the bacteria (710 mg; dry weight) was suspended in 20 ml of 0.1 M phosphate buffer (pH 8.0).
- 200 mg of 2-bromopropionitrile was added to the suspension.
- the mixture was reacted at 32°C for 30 hours under shaking.
- Insoluble matter was removed from the reaction solution by centrifugal separation.
- the pH of the supernatant liquid was adjusted with sodium hydroxide to 8.5.
- 20 ml of chloroform was added thereto to extract the unreacted 2-bromopropionitrile.
- the pH of the aqueous layer was adjusted to 1.5 with sulfuric acid.
- 40 ml of n-butanol was added thereto to extract the desired product.
- n-butanol layer was concentrated under reduced pressure and purified by means of column chromatography on silica gel (500 mg, adjusted with chloroform), eluting with chloroform-methanol (10:1 by volume). The desired eluate was concentrated under reduced pressure to give 45 mg of S-(-)-2-bromopropionic acid.
- Mycobacterium sp. AC777 strain was cultured.
- the bacteria (710 mg; dry weight) was suspended in 100 ml of 0.1 M phosphate buffer (pH 8.0).
- 100 mg of 2-phenoxypropionitrile was added to 10 ml of the suspension.
- the mixture was reacted at 32°C for 3 hours under shaking.
- Insoluble matter was removed from the reaction solution by centrifugal separation.
- the pH of the supernatant liquid was adjusted with sodium hydroxide to 9. 10 ml of chloroform was added thereto to remove the unreacted 2-phenoxypropionitrile and 2-phenoxypropionamide.
- the pH of the water layer was adjusted to 1 with hydrochloric acid.
- Example 2 10 ml of chloroform was added to the water layer to extract the desired product.
- the chloroform layer was concentrated under reduced pressure and purified in the same way as in Example 1 to give 34 mg of 2-phenoxypropionic acid.
- optical specificity was examined by high performance liquid chromatography. It was found that only (+) isomer was formed.
- Rhodococcus sp. AK 32 strain was cultured. Bacteria (270 mg; dry weight) was suspended in 100 ml of 0.1 M phosphate buffer (pH 8.0). 100 mg of 2-phenoxypropionamide was added to 10 ml of the suspension. The mixture was reacted at 32°C under shaking for 3 hours. Insoluble matters were removed from the reaction solution by centrifugal separation. The pH of the supernatant liquid was adjusted with sodium hydroxide to 9. 10 ml of chloroform was added thereto to remove the unreacted amide.
- Example 2 The pH of the supernatant liquid was adjusted to 1 with hydrochloric acid. 10 ml of chloroform was added thereto to extract the desired product. The chloroform layer was concentrated under reduced pressure and purified in the same way as in Example 1 to give 42 mg of 2-phenoxypropionic acid. In the same way as in Example 2, the optical specificity of this sample was examined by high performance liquid chromatography. It was found that only (+) isomer was formed.
- Mycobacterium sp. AC777 was cultured. 710 mg (dry weight) of bacteria was suspended in 100 ml of 0.1 M phosphate buffer (pH 8.0) and placed in Erlenmeyer flask. 500 mg of 3-chloro-2-methylpropionitrile was added to 50 ml of the suspension. The mixture was reacted at 32°C with shaking for 4 hours. Bacteria were removed from the reaction mixture by centrifugal separation. The pH of the supernatant liquid was adjusted to 1.0 with hydrochloric acid. 30 ml of n-butanol was added thereto to extract the desired product.
- optically active ⁇ -substituted organic acids having an optical purity of as high as at least 80%, or as extremely high as at least 90% according to the types of organic acids, can be obtained in high yields by the present invention.
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JP15691188 | 1988-06-27 | ||
JP156911/88 | 1988-06-27 |
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EP0348901A2 EP0348901A2 (en) | 1990-01-03 |
EP0348901A3 EP0348901A3 (en) | 1991-07-24 |
EP0348901B1 true EP0348901B1 (en) | 1995-12-06 |
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EP89111684A Expired - Lifetime EP0348901B1 (en) | 1988-06-27 | 1989-06-27 | Process for producing optically active alfa-substituted organic acid and microorganism and enzyme used therefor |
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EP (1) | EP0348901B1 (ja) |
JP (1) | JP2623345B2 (ja) |
DE (1) | DE68925002T2 (ja) |
DK (1) | DK314989A (ja) |
Families Citing this family (38)
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US5238828A (en) * | 1988-08-29 | 1993-08-24 | Idemitsu Kosan Company Limited | Method for the preparation of an optically active 2-substituted carboxylic acid |
EP0356912A3 (en) * | 1988-08-29 | 1991-09-18 | Idemitsu Kosan Company Limited | A method for the preparation of an optically active 2-substituted carboxylic acid |
JP2696127B2 (ja) * | 1990-03-22 | 1998-01-14 | 旭化成工業株式会社 | 光学活性な2―ヒドロキシカルボン酸の製造法 |
EP0449648B1 (en) * | 1990-03-30 | 1999-05-12 | Nitto Chemical Industry Co., Ltd. | Process for producing R(-)-mandelic acid and derivatives thereof |
JP2698936B2 (ja) * | 1990-08-16 | 1998-01-19 | 日東化学工業株式会社 | R(‐)―マンデル酸誘導体の製造法 |
DK161690D0 (da) * | 1990-07-05 | 1990-07-05 | Novo Nordisk As | Fremgangsmaade til fremstilling af enantiomere forbindelser |
US5242816A (en) * | 1990-07-10 | 1993-09-07 | Lonza Ltd. | Microbiological oxidation of alkyl groups in heterocycles |
JP2974737B2 (ja) * | 1990-08-16 | 1999-11-10 | 三菱レイヨン株式会社 | 光学活性乳酸の製造法 |
WO1992005275A1 (en) * | 1990-09-20 | 1992-04-02 | E.I. Du Pont De Nemours And Company | A process for the preparation of enantiomeric 2-alkanoic acids |
US5593871A (en) * | 1990-09-20 | 1997-01-14 | E. I. Du Pont De Nemours And Company | Process for the preparation of enantiometric 2-alkanoic acid amides from nitriles |
SG48037A1 (en) * | 1990-11-14 | 1998-04-17 | Nitto Chemical Industry Co Ltd | Biology process for production-alpha-hydroxyamide or alpha-hydroxy acid |
JPH04341185A (ja) * | 1990-12-11 | 1992-11-27 | Asahi Chem Ind Co Ltd | 新規ニトリラーゼ |
JP2676568B2 (ja) * | 1991-06-26 | 1997-11-17 | 日東化学工業株式会社 | R(−)−マンデル酸およびその誘導体の製造法 |
US5258305A (en) * | 1991-09-13 | 1993-11-02 | Nitto Chemical Industry Co., Ltd. | Manufacture of optically active 2-phenylpropionic acid and 2-phenylpropionamide from the nitrile using Rhodococcus equi |
JP2720140B2 (ja) * | 1993-02-03 | 1998-02-25 | 日東化学工業株式会社 | フェニル基を有する光学活性α−ヒドロキシカルボン酸の製造法 |
JP3218133B2 (ja) * | 1993-02-03 | 2001-10-15 | 三菱レイヨン株式会社 | フェニル基を有する光学活性α−ヒドロキシカルボン酸の製造法 |
US5597716A (en) * | 1993-11-18 | 1997-01-28 | Mitsubishi Rayon Co., Ltd. | Process for producing D-lactic acid and L-lactamide |
CA2150526C (en) * | 1994-06-09 | 2005-11-15 | Andreas Kiener | Biotechnological process for the preparation of cyclic s-.alpha.-amino carboxylic acids and r-.alpha.-amino carboxamides |
JP3235934B2 (ja) | 1994-08-04 | 2001-12-04 | 三菱レイヨン株式会社 | ロドコッカス属細菌由来カナマイシン耐性遺伝子 |
FR2724931B1 (fr) * | 1994-09-22 | 1996-12-20 | Rhone Poulenc Nutrition Animal | Hydrolyse enzymatique des 4-methylthiobutyronitrile |
US5814497A (en) * | 1994-09-22 | 1998-09-29 | Rhone-Poulenc Nutrition Animale | Enzymatic hydrolysis of racemic a-substituted 4-methylthiobutyronitriles using a nitrilase from alcaligenes faecalis, gordona terrae or rhodococcus sp |
DE69620847T3 (de) | 1995-11-10 | 2008-11-27 | Mitsubishi Rayon Co., Ltd. | Verfahren zur Herstellung einer alpha-Hydroxy-säure oder eines alpha-Hydroxy-amids mittels Mikroorganismen |
JPH10179183A (ja) * | 1996-12-20 | 1998-07-07 | Daicel Chem Ind Ltd | カルボン酸の製造方法 |
US5866379A (en) * | 1997-01-28 | 1999-02-02 | Novus International | Enzymatic conversion of α-hydroxynitriles to the corresponding .alpha. |
DE19848129A1 (de) * | 1998-10-19 | 2000-04-20 | Basf Ag | Verfahren zur Herstellung chiraler Carbonsäuren aus Nitrilen mit Hilfe einer Nitrilase oder Mikroorganismen, die ein Gen für die Nitrilase enthalten |
DE60042364D1 (de) * | 1999-04-16 | 2009-07-23 | Mitsubishi Rayon Co | Neue amidasegene |
DE10010149A1 (de) * | 2000-03-03 | 2001-09-06 | Basf Ag | Nitrilase aus Rhodococcus rhodochrous NCIMB 11216 |
JP4544695B2 (ja) * | 2000-04-28 | 2010-09-15 | 旭化成ケミカルズ株式会社 | グリシンの微生物学的な製造法 |
FR2822460B1 (fr) * | 2001-03-26 | 2005-04-29 | Rhodia Chimie Sa | Procede de preparation enantioselectif d'acides carboxyliques optiquement actifs par hydrolyse enzymatique de nitriles |
DE602004021778D1 (de) | 2003-02-27 | 2009-08-13 | Basf Se | Modifizierte nitrilasen und deren verwendung in verfahren zur herstellung von carbonsäuren |
JP4493011B2 (ja) * | 2004-06-11 | 2010-06-30 | 三菱レイヨン株式会社 | ロドコッカス属細菌由来トリメトプリム耐性ジヒドロ葉酸還元酵素及びその遺伝子 |
GB0413322D0 (en) * | 2004-06-15 | 2004-07-14 | Avecia Ltd | Process |
JP4929700B2 (ja) * | 2005-12-15 | 2012-05-09 | 住友化学株式会社 | カルボン酸の製造法 |
JP2007295821A (ja) * | 2006-04-28 | 2007-11-15 | Asahi Kasei Chemicals Corp | 生体触媒を用いたα−ヒドロキシ酸或いはα−ヒドロキシ酸アンモニウムの製造方法 |
EP1881077A1 (en) * | 2006-07-19 | 2008-01-23 | Solvay Organics GmbH | Process for the production of fluorine containing a-hydroxy carboxylic acids |
EP2574667A1 (en) | 2011-10-02 | 2013-04-03 | Technische Universität Graz | Enzyme variants |
CN114236024B (zh) * | 2021-12-07 | 2023-12-29 | 江苏宝众宝达药业股份有限公司 | 一种同时测定4-氟-3-硝基苯腈及其异构体含量的方法 |
CN117050922B (zh) * | 2023-10-11 | 2023-12-08 | 江苏聚庚科技股份有限公司 | 一种含氟苯腈类化合物降解菌及其在环境治理中的应用 |
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FR1342844A (fr) * | 1961-09-16 | 1963-11-15 | Bayer Ag | Procédé de préparation d'acides phénoxyacétiques substitués, optiquement actifs |
JPS5414668B2 (ja) * | 1972-09-05 | 1979-06-08 | ||
DK261685A (da) * | 1985-06-11 | 1986-12-12 | Novo Industri As | Fremgangsmaade til fremstilling af optisk aktive, organiske forbindelser |
JPS6255098A (ja) * | 1985-09-04 | 1987-03-10 | Nitto Chem Ind Co Ltd | 光学活性α−オキシ酸の製造法 |
FR2626289B1 (fr) * | 1988-01-27 | 1990-06-08 | Rhone Poulenc Sante | Procede de preparation d'acides aryl-2 alkanoiques optiquement actifs |
FR2626288B1 (ja) * | 1988-01-27 | 1990-05-18 | Rhone Poulenc Sante | |
FR2631975B1 (fr) * | 1988-05-26 | 1990-11-30 | Rhone Poulenc Chimie | Procede de preparation d'acides aryloxy-2 ou arylthio-2 alkanoiques optiquement actifs |
-
1989
- 1989-06-26 JP JP1160653A patent/JP2623345B2/ja not_active Expired - Fee Related
- 1989-06-26 DK DK314989A patent/DK314989A/da not_active Application Discontinuation
- 1989-06-27 DE DE68925002T patent/DE68925002T2/de not_active Expired - Fee Related
- 1989-06-27 EP EP89111684A patent/EP0348901B1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
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PATENT ABSTRACTS OF JAPAN, vol. 10, no. 262 (C-371)[2318], 06 September 1986 * |
Also Published As
Publication number | Publication date |
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JPH0284198A (ja) | 1990-03-26 |
JP2623345B2 (ja) | 1997-06-25 |
EP0348901A2 (en) | 1990-01-03 |
DK314989D0 (da) | 1989-06-26 |
DK314989A (da) | 1989-12-28 |
EP0348901A3 (en) | 1991-07-24 |
DE68925002D1 (de) | 1996-01-18 |
DE68925002T2 (de) | 1996-08-29 |
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